If you're getting 8-10 mpg in the city...what are you driving and how? I am getting about 16.5 in the city and maybe 18-19 mpg on the hwy. 6mpg and <10mpg is low I think. I'd be going the 335d or X5d or 535d route if I was getting that most definitely!

OK - I did some research on the EPA site. It states that the tax applies for cars that have a combined rating of 22.5 or less. The 550 x-drive auto has a combined rating of 19mpg, but I did not pay a tax when I purchased my 2013 model. While I am glad I did not pay a tax, I am confused.

The GGT is calculated using the old EPA test procedure, so the current numbers won't match-up.

I might believe in God, Buddha or Allah, but global warming and climate change due to human activity are scientifically proved facts.

It may be true, but it's not scientifically proved. And, if you look at it, the Vikings were running farms on greenland were it's all snow and ice now. There even was forests on greenland back then. So either the clima change naturally to a wider degree than what the eco-freaks worry about now, or the Vikings farted so much it raised the co2 level... I think I'll stick with the first alternative.

Then no one would buy it, which is what the congress environmentalist green tree huggers are wanting.

The whole concept of an environmental tax on cars is a political one, not based on any sort of environmental science. The logic is that if you can afford to drive a car that uses a lot of fuel, then you can afford to contribute more in taxes.